After President Trump visited China last month, he boasted of a promise from his Chinese counterpart Xi Jinping “to use his great economic influence” over the North Korean regime to abandon its nuclear missile program.

That promise, if it was made, will soon be put to the test.

On Wednesday, North Korea launched an intercontinental ballistic missile, its third and most advanced yet, with experts calculating that the U.S. capital is now technically within North Korean leader Kim Jong Un’s reach.

North Korea said the Hwasong-15, could be armed with a “super-large heavy nuclear warhead” and is capable of striking the entire U.S. mainland. In a government statement, it said Kim “declared with pride” that the country had achieved its goal of becoming a “rocket power.”

China’s Foreign Ministry responded by expressing its “grave concern and opposition” to the launch by North Korea, which it refers to by its official name, the Democratic People’s Republic of Korea, or DPRK.

“We strongly urge the DPRK side to abide by the relevant U.N. Security Council resolutions and halt any moves that could aggravate the situation on the Korean Peninsula,” Foreign Ministry spokesman Geng Shuang told sources.